<html>
  <head>
    <style>
    img { margin:3px; } 
    img#n2 { background-color:#ff8080; } 
    img#n3 { background-color:#8080ff; } 
    img#n4 { background-color:#80ff80; } 
    </style>
  </head>
<body>
  <p>APNG - animated PNG. See: http://en.wikipedia.org/wiki/APNG </p>
  <img #n1 src="loading_16.png" />
  <img #n2 src="loading_16.png" />
  <img #n3 src="loading_16.png" />
  <img #n4 src="loading_16.png" />
</body>
</html>